[PATCH] drm: Fix documentation warning for read_mpcc_state in mpc.h

[Abhishek Tamboli <abhishektamboli9@gmail.com>]

Add detail description for the read_mpcc_state function in the
mpc_funcs struct to resolve the documentation warning.

A kernel-doc warning was addressed:
./drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h:547: warning:
Function parameter or struct member 'read_mpcc_state' not
described in 'mpc_funcs'.

Signed-off-by: Abhishek Tamboli <abhishektamboli9@gmail.com>
---
 drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h b/drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
index 34a398f23fc6..9e65ecf1d3b0 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
@@ -282,6 +282,22 @@ struct mpcc_state {
  * struct mpc_funcs - funcs
  */
 struct mpc_funcs {
+	/**
+	 * @read_mpcc_state:
+	 *
+	 * Reads the state of a given MPCC instance.
+	 *
+	 * Parameters:
+	 *
+	 * - [in/out] mpc - MPC context.
+	 * - [in] mpcc_inst - MPCC Instance whose state is to be read.
+	 * - [out] mpcc_state - MPCC state structure where the state
+	 *                    of the MPCC instance will be stored.
+	 *
+	 * Return:
+	 *
+	 * void
+	 */
 	void (*read_mpcc_state)(
 			struct mpc *mpc,
 			int mpcc_inst,
-- 
2.34.1